How to access fields in an underlying object in java.lang.reflect.Proxy, especially org.springframework.aop.framework.JdkDynamicAopProxy

To access fields in an underlying object in java.lang.reflect.Proxy,

especially org.springframework.aop.framework.JdkDynamicAopProxy,

you can use the following code:

    DirectFieldAccessor directFieldAccessor = new DirectFieldAccessor(someRepository);
    Object h = directFieldAccessor.getPropertyValue("h");
    directFieldAccessor = new DirectFieldAccessor(h);
    Object advised = directFieldAccessor.getPropertyValue("advised");
    directFieldAccessor = new DirectFieldAccessor(advised);
    Object targetSource = directFieldAccessor.getPropertyValue("targetSource");
    directFieldAccessor = new DirectFieldAccessor(targetSource);
    Object target = directFieldAccessor.getPropertyValue("target");
    directFieldAccessor = new DirectFieldAccessor(target);
    directFieldAccessor.setPropertyValue("sqlSessionSelector", sqlSessionSelector);